In theory, someone who trolls is breaking
rule 3 of the forum but from what I've heard from the older folks on the site it's been a long time since it was enforced or it's only done in the most exaggerated cases.
Although in this case I think it is simply someone who has mental problems, and it seems that from the forum they are quite lenient with them, as in the case of Polo7 and his multiple alts.